C++ || Char Array – Convert Text Contained In A Character Array From Lower To UPPERCASE

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This program demonstrates how to switch text which is contained in a char array from lower to UPPERCASE. This program also demonstrates how to convert all of the text contained in a char array to lower/UPPERCASE.

REQUIRED KNOWLEDGE FOR THIS PROGRAM

Character Arrays
Cin.getline
Islower
Isupper
Tolower
Toupper
Strlen
While Loops
For Loops
Constant Variables
Setw

Using a constant integer value, this program first asks the user to enter in 3 lines of text they wish to convert from lower to UPPERCASE. Upon obtaining the information from the user, the program then converts all the text which was placed into the character array from lower to uppercase in the following order:

(1) Switches the text from lower to UPPERCASE
(2) Converts all the text to UPPERCASE
(3) Converts all the text to lowercase

After each conversion is complete, the program displays the updated information to the screen via cout.

NOTE: On some compilers, you may have to add #include < cstdlib>, #include < cctype>, and #include < cstring> in order for the code to compile.


QUICK NOTES:
The highlighted lines are sections of interest to look out for.

Click here to see how cin.getline works.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output

Please enter 3 line(s) of text you wish to convert from lower to UPPERCASE:
#1: I StriKe hiM a heAVy bloW.
#2: When cAn the neRve ShinE?
#3: My Programming Notes.

------------------------------------------------------------
This is what you entered into the system:
Text #1: I StriKe hiM a heAVy bloW.
Text #2: When cAn the neRve ShinE?
Text #3: My Programming Notes.

------------------------------------------------------------
This is the information switched from lower to UPPERCASE:
Text #1: i sTRIkE HIm A HEavY BLOw.
Text #2: wHEN CaN THE NErVE sHINe?
Text #3: mY pROGRAMMING nOTES.

------------------------------------------------------------
This is the information converted to all UPPERCASE:
Text #1: I STRIKE HIM A HEAVY BLOW.
Text #2: WHEN CAN THE NERVE SHINE?
Text #3: MY PROGRAMMING NOTES.

------------------------------------------------------------
This is the information converted to all lowercase:
Text #1: i strike him a heavy blow.
Text #2: when can the nerve shine?
Text #3: my programming notes.

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